pH 1.0 Standard @ 25°C

2,3,7-Trichloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

2,2',4,6,6'-Pentamethyl-3-heptene (cis,trans)

4-n-Nonylphenol D8 (ring D4-ethylD4), 100 ng/µl, 1.1ml